Jail-cell.



No. 858;'309; i PATENTEDJUNB 25, 1-907.

'- J. B. SMITH.

JAIL CELL.

APPLICATION FILED Nov.'1,'1ooe. -a sums-SHEET s.Y

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No. 858,309. PATENTED JUNE 25, 1907.

' J. B. SMITH.

J AIL CELL. APrLIoATIoN Hmm nov. 1a, 190e. l

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1HE Nmmls Perales co., wnsumoran. n. c.

JAMES BRADFORD SMITH, OF JACKSON, MISSISSIPPI.

AIL-CELL.

Specification of Letters Patent.

Patented June 25, 1907.

Application led November 16, 1906. Serial No. 343.749.

are so constructed that any attempt on the part of the occupant of the cell to break out of the same will sound an alarm.

With this end in view, the invention con-. sists in forming the cell of tubular bars which are filled with compressed air through the medium of a su ply pipe and in forming the door of the cellphollow in orderthat it too may be lled with compressed air.

The alarm mechanism for the cell comprises a metallic tube which is connected with the compressed air reservoir and in which is located a flexible tube which is normally iniiated by the air within the reservoir, there being pawls engaged with the gearing of two alarms, which pawls have portions enigraging the flexible tube so thatl escape of air om any portion of the system will cause the flexible tube to collapse and permit actuation of the pawls to release one or the other of the alarms. Springs are connected with the pawls to insure their actuation when the tube collapses and the tension of these springs is so adjusted that a very small leak in the system will sound one alarm and a considerable leak will sound the other alarm.

In the accompanying drawings: Figure 1 is a view in front elevation showinga cell con.

structed in accordance with my invention and also showing the alarm connected therewith. Fig. 2 is a detail horizontal sectional view through the cell door and the frame therefor. Fig. 3 is a detail view in front elevation of the alarm mechanism embodied in my invention, parts being shown in section, and Fig. 4 is a detail horizontal sectional view therethrough taken in a plane with one of the pawls. Fig. 5 is a view similar to Fig. 3 showing a slightly modified form of my invention. j

Referring more specifically to the drawings, the cell is shown as being formed of tubes or pipes 5 which intersect each other in the usual manner employed in cell construction,

and the cell includes a door frame 6 which is hollow in construction and with which certain of the pipes 5 communicate, it being under'- stood that the pipes of the cells are also intercommunicating. A door 7 is hinged to close the door way of the cell and the said door is also hollow in construction and is in communication with its frame by means of a flexible pipe 8 which is connected at one of its ends with the upright of the frame to which the door is hinged and at its other end to the door at an adjacent point.

A reservoir 9 of any desired` construction is adapted to supply air to the pipes 5, the door frame 6, and the door 7 by means of a pipe 10 which establishes communication between the reservoir and one of the pipes 5 forming the cell, the said reservoir lbeing provided with a valved ni ple 11 by means of which air may be supplled to the reservoir until the proper pressure has been obtained, this being etermined by a gage 12 -which is carried by the reservoir. Communicating with the reservoir and projecting upwardly therefrom is a pipe 13 which is closed at its upper endand which is provided at different points and in opposite sides with openings 14 and 15. Arranged within the pipe 13 is a flexible tube 16 which is inatable and hence collapsible so that leakage in any portion of the system will affect it.

A board 17 is arranged adjacent the tube 13 and upon the board is mounted a small bell 18 and a large bell 19 and pivoted adjacent the bells for contact therewith are clappers 20 and 21. These clappers have their ends opposite their ball ends resting in engagement with the teeth of ratchet wheels 22 and 23 respectively, the said ratchet disks being designed for Arotation by means of springs 24 and 25 respectively.

To prevent rotation of the ratchet disks until the proper time arrives, pawls are provided and these pawls comprise each a stem 26 which is provided at its outer end with a tooth 27 for engagement with the teeth of the respective ratchet disks 22 and 23, the said stem being slidably engaged through eye members 28 carried by the board and having their toothed or outer ends resting upon brackets 29. The inner ends of the stems 26 are flared as at 30 and rest against those portions of the inner flexible tube 16 which are located opposite the openings 14 and 15 in the outer tube, it being understood that when the said inner tube collapses, the

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said stems may be moved out of engagement with their respective ratchet disks. In order to cause such movement of the stems a tension device is provided for each, and each of these tension devices comprises a wire 31 which is bent as at 32 for engagement over A the outer tube 13 and which has its end portion which is indicated by the numeral 33, engaged through an opening 34 formed in the respective stems 26 adjacent its flared end. A spring 35 is connected at one of its ends with the opposite end of the wire 31 and at its other end with an adjusting screw 36 which is engaged through a bracket 37.

In practice, the tension of the springs 35 is so adjusted that the spring which controls the pawl for the small alarm will act upon the pawl when the pressure in the system has been reduced to the slightest degree, owing to leakage, and the spring which controls the pawl for the larger alarm is adjusted so that a considerable leakage can take place before the said alarm will be sounded, and it will thus be understood that leakage of the valved nipple 11 or any other leakage due to wear of parts will sound the small alarm and that the breakage of any of the pipes of the system causing a considerable leakage, will sound both alarms.

In the form of my invention shown in Fig. 5 I have shown a tube 13a which leads from the upper end of a suitable compressed air tank or reservoir, and in this tube there is located a piston 38 including a stemI 39 upon which is engaged a spring 40, the said spring bearing at one of its ends against the piston 38 and at its opposite end against the upper` closed end of the tube 13a. The stem 39 projects a considerable distance above the upper end of the tube 13a and is provided with trips 41 and 42 which are adapted to be held in various adjusted positions upon the stem by means of set screws 43 and 44 respectively. The minor and major gongs are indicated by the numerals 18L and 19a respectively in this figure and their respective clappers by the numerals 20a and 21a, the clappers being engaged as in the preferred form of the invention with ratchet disks 22L and 23a. The pawl rods in this form of the invention, however, are not slidable but are pivoted as at 45 and 46, the said rods being indicated by the numerals 47 and 48 respectively for the minor and major gongs.

It will be readily understood from the foregoing description that the trips 41 and 42 are designed to engage respectively thc pawl rods 47 and 48 to swing them upon their pivots and cause their disengagement from their respective ratchet wheels 22a and 23u, and in order that the device may indicate the exact cell from which the air is cscaping, the pawl rod 48 is extended beyond its pivot point and engages a tongue 49 formed at the outer edge of a hinged indicating disk 50, the disk being designed to drop by gravity and display the number of the cell, when the pawl rod 48 is rocked.

What is claimed is 1. An alarm system of the class described comprising an inclosure formed of interconnected pipe sections, a hollow door frame having communication with certain of the pipe sections, a hollow door hinged to the frame, a flexible pipe establishing communication between the door and the frame, means for supplying a iiuid under pressure to the system, and an alarm adapted to be actuated by a reduction in pressure in the system.

2. An alarm system of the class described comprising an inclosure formed of hollow intercommunicating sections, means for supplying iiuid under pressure to the sections, a rigid pipe connected with the last-named means, an inflatable tube located in the pipe, said pipe being provided with an opening, an alarm, and means extending through the opening in the pipe and into engagement with the inflatable tube for releasing the alarm when the pressure in the system is reduced.'

In testimony whereof, I ailix my signature, in presence of two witnesses.

JAMES BRADFORD SMITH.

Witnesses:

H. D. Bownns, W. M. ANDERSON. 

